Best practices for template rendering with Jinja2 including environments, filters, autoescaping, and security.

Best practices for HTTP client usage with Requests including sessions, error handling, and timeouts.

- Read skill file at node_modules/playwright/lib/skill/SKILL.md

Explains how to add and debug playwright MCP tools and CLI commands.

Best practices for building CLI applications with Click including commands, groups, options, and testing.

Best practices for numerical computing with NumPy including arrays, broadcasting, and vectorization.

Best practices for Flask web development including routing, blueprints, and testing.

Best practices for Django web development including models, views, templates, and testing.

Best practices for writing and organizing tests with pytest including fixtures, parametrize, and plugins.

Orchestrates Aspire distributed applications using the Aspire CLI for running, debugging, and managing distributed apps. USE FOR: aspire start, aspire stop, start aspire app, aspire describe, list aspire integrations, debug aspire issues, view aspire logs, add aspire resource, aspire dashboard, update aspire apphost. DO NOT USE FOR: non-Aspire .NET apps (use dotnet CLI), container-only deployments (use docker/podman), Azure deployment after local testing (use azure-deploy skill). INVOKES: Aspire CLI commands (aspire start, aspire describe, aspire otel logs, aspire docs search, aspire add), bash. FOR SINGLE OPERATIONS: Use Aspire CLI commands directly for quick resource status or doc lookups.

Triage a Playwright bug report by reproducing it from the information in the issue. Use when asked to triage, reproduce, or verify a GitHub issue (a new bug report, or an existing report with a new comment).

Explains how to develop Playwright - add APIs, MCP tools, CLI commands, and vendor dependencies.